http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Chemical mixtures and environmental effects
a pilot study to assess ecological exposure and effects in streams
1 online resource (12 pages) : color illustrations, color maps.
Includes bibliographical references (pages 10-12).
U.S. Geological Survey open-file report ; 2015-1113